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Finding the Fourth Proportional to 405.70, 558.76 and 350.41

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Solution

The fourth proportional to 405.70, 558.76 and 350.41 is: 482.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.70 : 558.76 = 350.41 : x
  2. Step 2: Convert to fraction form
    405.70/558.76 = 350.41/x
  3. Step 3: Cross multiply
    405.70x = 558.76 × 350.41
  4. Step 4: Simplify right side
    405.70x = 195,795.09
  5. Step 5: Solve for x
    x = 195,795.09/405.70
  6. Step 6: Final answer
    x = 482.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.